[PATCH v2 2/3] trailers: export action enums and corresponding lookup functions

[Paolo Bonzini <bonzini@gnu.org>]

From: Paolo Bonzini <pbonzini@redhat.com>

Separate the mechanical changes out of the next patch.  The functions
are changed to take a pointer to enum, because struct conf_info is not
going to be public.

Set the default values explicitly in default_conf_info, since they are
not anymore close to default_conf_info and it's not obvious which
constant has value 0.  With the next patch, in fact, the values will
not be zero anymore!

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
	v1->v2: avoid use of designated initializers

 trailer.c | 48 +++++++++++++++++++++++-------------------------
 trailer.h | 22 ++++++++++++++++++++++
 2 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/trailer.c b/trailer.c
index a3eb42818..a371c7b45 100644
--- a/trailer.c
+++ b/trailer.c
@@ -10,11 +10,6 @@
  * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
  */
 
-enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START };
-enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT,
-			EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING };
-enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING };
-
 struct conf_info {
 	char *name;
 	char *key;
@@ -374,44 +369,44 @@ static void process_trailers_lists(struct list_head *head,
 	}
 }
 
-static int set_where(struct conf_info *item, const char *value)
+int set_where(enum action_where *item, const char *value)
 {
 	if (!strcasecmp("after", value))
-		item->where = WHERE_AFTER;
+		*item = WHERE_AFTER;
 	else if (!strcasecmp("before", value))
-		item->where = WHERE_BEFORE;
+		*item = WHERE_BEFORE;
 	else if (!strcasecmp("end", value))
-		item->where = WHERE_END;
+		*item = WHERE_END;
 	else if (!strcasecmp("start", value))
-		item->where = WHERE_START;
+		*item = WHERE_START;
 	else
 		return -1;
 	return 0;
 }
 
-static int set_if_exists(struct conf_info *item, const char *value)
+int set_if_exists(enum action_if_exists *item, const char *value)
 {
 	if (!strcasecmp("addIfDifferent", value))
-		item->if_exists = EXISTS_ADD_IF_DIFFERENT;
+		*item = EXISTS_ADD_IF_DIFFERENT;
 	else if (!strcasecmp("addIfDifferentNeighbor", value))
-		item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
+		*item = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
 	else if (!strcasecmp("add", value))
-		item->if_exists = EXISTS_ADD;
+		*item = EXISTS_ADD;
 	else if (!strcasecmp("replace", value))
-		item->if_exists = EXISTS_REPLACE;
+		*item = EXISTS_REPLACE;
 	else if (!strcasecmp("doNothing", value))
-		item->if_exists = EXISTS_DO_NOTHING;
+		*item = EXISTS_DO_NOTHING;
 	else
 		return -1;
 	return 0;
 }
 
-static int set_if_missing(struct conf_info *item, const char *value)
+int set_if_missing(enum action_if_missing *item, const char *value)
 {
 	if (!strcasecmp("doNothing", value))
-		item->if_missing = MISSING_DO_NOTHING;
+		*item = MISSING_DO_NOTHING;
 	else if (!strcasecmp("add", value))
-		item->if_missing = MISSING_ADD;
+		*item = MISSING_ADD;
 	else
 		return -1;
 	return 0;
@@ -471,15 +466,15 @@ static int git_trailer_default_config(const char *conf_key, const char *value, v
 	variable_name = strrchr(trailer_item, '.');
 	if (!variable_name) {
 		if (!strcmp(trailer_item, "where")) {
-			if (set_where(&default_conf_info, value) < 0)
+			if (set_where(&default_conf_info.where, value) < 0)
 				warning(_("unknown value '%s' for key '%s'"),
 					value, conf_key);
 		} else if (!strcmp(trailer_item, "ifexists")) {
-			if (set_if_exists(&default_conf_info, value) < 0)
+			if (set_if_exists(&default_conf_info.if_exists, value) < 0)
 				warning(_("unknown value '%s' for key '%s'"),
 					value, conf_key);
 		} else if (!strcmp(trailer_item, "ifmissing")) {
-			if (set_if_missing(&default_conf_info, value) < 0)
+			if (set_if_missing(&default_conf_info.if_missing, value) < 0)
 				warning(_("unknown value '%s' for key '%s'"),
 					value, conf_key);
 		} else if (!strcmp(trailer_item, "separators")) {
@@ -533,15 +528,15 @@ static int git_trailer_config(const char *conf_key, const char *value, void *cb)
 		conf->command = xstrdup(value);
 		break;
 	case TRAILER_WHERE:
-		if (set_where(conf, value))
+		if (set_where(&conf->where, value))
 			warning(_("unknown value '%s' for key '%s'"), value, conf_key);
 		break;
 	case TRAILER_IF_EXISTS:
-		if (set_if_exists(conf, value))
+		if (set_if_exists(&conf->if_exists, value))
 			warning(_("unknown value '%s' for key '%s'"), value, conf_key);
 		break;
 	case TRAILER_IF_MISSING:
-		if (set_if_missing(conf, value))
+		if (set_if_missing(&conf->if_missing, value))
 			warning(_("unknown value '%s' for key '%s'"), value, conf_key);
 		break;
 	default:
@@ -556,6 +551,9 @@ static void ensure_configured(void)
 		return;
 
 	/* Default config must be setup first */
+	default_conf_info.where = WHERE_END;
+	default_conf_info.if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
+	default_conf_info.if_missing = MISSING_ADD;
 	git_config(git_trailer_default_config, NULL);
 	git_config(git_trailer_config, NULL);
 	configured = 1;
diff --git a/trailer.h b/trailer.h
index e90ba1270..f306bf059 100644
--- a/trailer.h
+++ b/trailer.h
@@ -1,11 +1,33 @@
 #ifndef TRAILER_H
 #define TRAILER_H
 
+enum action_where {
+	WHERE_END,
+	WHERE_AFTER,
+	WHERE_BEFORE,
+	WHERE_START
+};
+enum action_if_exists {
+	EXISTS_ADD_IF_DIFFERENT_NEIGHBOR,
+	EXISTS_ADD_IF_DIFFERENT,
+	EXISTS_ADD,
+	EXISTS_REPLACE,
+	EXISTS_DO_NOTHING
+};
+enum action_if_missing {
+	MISSING_ADD,
+	MISSING_DO_NOTHING
+};
+
 struct trailer_opts {
 	int in_place;
 	int trim_empty;
 };
 
+int set_where(enum action_where *item, const char *value);
+int set_if_exists(enum action_if_exists *item, const char *value);
+int set_if_missing(enum action_if_missing *item, const char *value);
+
 struct trailer_info {
 	/*
 	 * True if there is a blank line before the location pointed to by
-- 
2.13.0